徐八林, 许彦艳, 解莉燕, 陆鹏, 徐舒扬, 袁东升. 雷达估测降水在山洪灾害中的应用分析[J]. 云南大学学报(自然科学版), 2021, 43(2): 326-334. doi: 10.7540/j.ynu.20200122
引用本文: 徐八林, 许彦艳, 解莉燕, 陆鹏, 徐舒扬, 袁东升. 雷达估测降水在山洪灾害中的应用分析[J]. 云南大学学报(自然科学版), 2021, 43(2): 326-334. doi: 10.7540/j.ynu.20200122
XU Ba-lin, XU Yan-yan, XIE Li-yan, LU Peng, XU Shu-yang, YUAN Dong-sheng. Application analysis of radar-measured precipitation in mountain flood disaster[J]. Journal of Yunnan University: Natural Sciences Edition, 2021, 43(2): 326-334. DOI: 10.7540/j.ynu.20200122
Citation: XU Ba-lin, XU Yan-yan, XIE Li-yan, LU Peng, XU Shu-yang, YUAN Dong-sheng. Application analysis of radar-measured precipitation in mountain flood disaster[J]. Journal of Yunnan University: Natural Sciences Edition, 2021, 43(2): 326-334. DOI: 10.7540/j.ynu.20200122

雷达估测降水在山洪灾害中的应用分析

Application analysis of radar-measured precipitation in mountain flood disaster

  • 摘要: 以云南省麻栗坡县2018年“09.02”特大山洪泥石流灾害为例,结合丽江、曲靖的其它个例,主要采用天气诊断和雷达估测降水在山洪灾害中的技术应用,分析得出如下结果:①诱发此次山洪灾害的天气原因主要是低涡沿两高间辐合区西移,受高原山地地形抬升作用影响,造成多个中γ尺度单体合并,产生局地强降水引发灾害;②分析雷达资料可更加全面、细致地了解到致灾原因、降水分布、强降水落区和分布时段,并且较地面实测降水量有一定的提前量;③雷达资料进行反演降水的估测,可一定程度弥补没有雨量站区域或雨量站故障区域的降水情况. 通过雷达反演降水得到一些降水变化规律,如降水分布的特殊性、雨团系统的降水强度受地形影响形成的多样性、层状云中镶嵌的中γ尺度单体发生合并有时可引发合并区域下方强降水、高山雷达估测降水的应用、高山雷达探测的一些局限及弥补措施等,这些对积极地探索高原地区暴雨引发泥石流的致灾机制,在防灾减灾中有一定的价值.

     

    Abstract: Technological application of weather diagnosis and radar-measured precipitation was employed in analyzing the mountain flood disaster on September 2nd 2018 in Malipo County, Yunnan Province, combined with some cases in Lijiang and Qujing Cities. The results show: ① The chief reasons causing that disaster were low vortex moving westward along the convergence zone between subtropical anticyclone and continental anticyclone, affected by the plateau mountainous terrain lifting effect, which further led to mesoscale cellular convection combination and local heavy rain. ② The analysis of radar data can provide a more comprehensive and detailed understanding of the cause of the disaster, precipitation distribution, heavy precipitation areas and distribution periods, and has a certain amount of advance compared with the measured precipitation on the ground. ③ The radar estimation of precipitation can make up for the precipitation data in the area without rain-observation. Some precipitation change law was obtained by employing radar to estimate precipitation, such as the particularity of distribution, the diversity of precipitation intensity affected by terrain, mesoscale cellular convection combination in stratified clouds causing heavy precipitation, application of high-mountain radar to predict precipitation as well as the limits and making-up measures of the application. These all are somewhat valuable in exploring the mechanism of how mountain torrents lead to mud and rock slides, and preventing and reducing disasters.

     

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